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decide.go
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decide.go
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package generator
import (
"context"
"fmt"
"os"
"path/filepath"
"strings"
mstrings "github.com/devimteam/microgen/generator/strings"
"github.com/devimteam/microgen/generator/template"
lg "github.com/devimteam/microgen/logger"
"github.com/vetcher/go-astra/types"
)
const (
TagMark = template.TagMark
MicrogenMainTag = template.MicrogenMainTag
ProtobufTag = "protobuf"
GRPCClientAddr = "grpc-addr"
MiddlewareTag = template.MiddlewareTag
LoggingMiddlewareTag = template.LoggingMiddlewareTag
RecoveringMiddlewareTag = template.RecoveringMiddlewareTag
HttpTag = template.HttpTag
HttpServerTag = template.HttpServerTag
HttpClientTag = template.HttpClientTag
GrpcTag = template.GrpcTag
GrpcServerTag = template.GrpcServerTag
GrpcClientTag = template.GrpcClientTag
MainTag = template.MainTag
ErrorLoggingMiddlewareTag = template.ErrorLoggingMiddlewareTag
TracingMiddlewareTag = template.TracingMiddlewareTag
CachingMiddlewareTag = template.CachingMiddlewareTag
JSONRPCTag = template.JSONRPCTag
JSONRPCServerTag = template.JSONRPCServerTag
JSONRPCClientTag = template.JSONRPCClientTag
Transport = template.Transport
TransportClient = template.TransportClient
TransportServer = template.TransportServer
MetricsMiddlewareTag = template.MetricsMiddlewareTag
ServiceDiscoveryTag = template.ServiceDiscoveryTag
HttpMethodTag = template.HttpMethodTag
HttpMethodPath = template.HttpMethodPath
)
func ListTemplatesForGen(ctx context.Context, iface *types.Interface, absOutPath, sourcePath string, genProto string, genMain bool) (units []*GenerationUnit, err error) {
importPackagePath, err := resolvePackagePath(filepath.Dir(sourcePath))
if err != nil {
return nil, err
}
absSourcePath, err := filepath.Abs(sourcePath)
if err != nil {
return nil, err
}
outImportPath, err := resolvePackagePath(absOutPath)
if err != nil {
return nil, err
}
m := make(map[string]bool, len(iface.Methods))
for _, fn := range iface.Methods {
m[fn.Name] = !mstrings.ContainTag(mstrings.FetchTags(fn.Docs, TagMark+MicrogenMainTag), "-")
}
info := &template.GenerationInfo{
SourcePackageImport: importPackagePath,
SourceFilePath: absSourcePath,
Iface: iface,
OutputPackageImport: outImportPath,
OutputFilePath: absOutPath,
ProtobufPackageImport: mstrings.FetchMetaInfo(TagMark+ProtobufTag, iface.Docs),
FileHeader: defaultFileHeader,
AllowedMethods: m,
ProtobufClientAddr: mstrings.FetchMetaInfo(TagMark+GRPCClientAddr, iface.Docs),
}
lg.Logger.Logln(3, "\nGeneration Info:", info.String())
/*stubSvc, err := NewGenUnit(ctx, template.NewStubInterfaceTemplate(info), absOutPath)
if err != nil {
return nil, err
}
units = append(units, stubSvc)*/
genTags := mstrings.FetchTags(iface.Docs, TagMark+MicrogenMainTag)
lg.Logger.Logln(2, "Tags:", strings.Join(genTags, ", "))
uniqueTemplate := make(map[string]template.Template)
for _, tag := range genTags {
templates := tagToTemplate(tag, info)
if templates == nil {
lg.Logger.Logln(1, "Warning: Unexpected tag", tag)
continue
}
for _, t := range templates {
uniqueTemplate[t.DefaultPath()] = t
}
}
for _, t := range uniqueTemplate {
unit, err := NewGenUnit(ctx, t, absOutPath)
if err != nil {
return nil, fmt.Errorf("%s: %v", absOutPath, err)
}
units = append(units, unit)
}
if genProto != "" {
u, err := NewGenUnit(ctx, template.NewProtoTemplate(info, genProto), absOutPath)
if err != nil {
return nil, fmt.Errorf("%s: %v", absOutPath, err)
}
units = append(units, u)
}
if genMain {
u, err := NewGenUnit(ctx, template.NewMainTemplate(info), absOutPath)
if err != nil {
return nil, fmt.Errorf("%s: %v", absOutPath, err)
}
units = append(units, u)
}
return units, nil
}
func tagToTemplate(tag string, info *template.GenerationInfo) (tmpls []template.Template) {
switch tag {
case MiddlewareTag:
return append(tmpls, template.NewMiddlewareTemplate(info))
case LoggingMiddlewareTag:
return append(
append(tmpls, tagToTemplate(MiddlewareTag, info)...),
template.NewLoggingTemplate(info),
)
case GrpcTag:
return append(
append(tmpls, tagToTemplate(Transport, info)...),
template.NewGRPCClientTemplate(info),
template.NewGRPCServerTemplate(info),
template.NewGRPCEndpointConverterTemplate(info),
template.NewStubGRPCTypeConverterTemplate(info),
)
case GrpcClientTag:
return append(
append(tmpls, tagToTemplate(TransportClient, info)...),
template.NewGRPCClientTemplate(info),
template.NewGRPCEndpointConverterTemplate(info),
template.NewStubGRPCTypeConverterTemplate(info),
)
case GrpcServerTag:
return append(
append(tmpls, tagToTemplate(TransportServer, info)...),
template.NewGRPCServerTemplate(info),
template.NewGRPCEndpointConverterTemplate(info),
template.NewStubGRPCTypeConverterTemplate(info),
)
case HttpTag:
return append(
append(tmpls, tagToTemplate(Transport, info)...),
template.NewHttpServerTemplate(info),
template.NewHttpClientTemplate(info),
template.NewHttpConverterTemplate(info),
)
case HttpServerTag:
return append(
append(tmpls, tagToTemplate(TransportServer, info)...),
template.NewHttpServerTemplate(info),
template.NewHttpConverterTemplate(info),
)
case HttpClientTag:
return append(
append(tmpls, tagToTemplate(TransportClient, info)...),
template.NewHttpClientTemplate(info),
template.NewHttpConverterTemplate(info),
)
case RecoveringMiddlewareTag:
return append(
append(tmpls, tagToTemplate(MiddlewareTag, info)...),
template.NewRecoverTemplate(info),
)
case MainTag:
lg.Logger.Logln(1, "Warning: Tag main is deprecated, use flag -main instead.")
return nil
case ErrorLoggingMiddlewareTag:
return append(
append(tmpls, tagToTemplate(MiddlewareTag, info)...),
template.NewErrorLoggingTemplate(info),
)
case CachingMiddlewareTag:
return append(
append(tmpls, tagToTemplate(MiddlewareTag, info)...),
template.NewCacheMiddlewareTemplate(info),
)
case TracingMiddlewareTag:
return append(tmpls, template.EmptyTemplate{})
case MetricsMiddlewareTag:
return append(tmpls, template.EmptyTemplate{})
case ServiceDiscoveryTag:
return append(tmpls, template.EmptyTemplate{})
case Transport:
return append(tmpls,
template.NewExchangeTemplate(info),
template.NewEndpointsTemplate(info),
template.NewEndpointsClientTemplate(info),
template.NewEndpointsServerTemplate(info),
)
case TransportClient:
return append(tmpls,
template.NewExchangeTemplate(info),
template.NewEndpointsTemplate(info),
template.NewEndpointsClientTemplate(info),
)
case TransportServer:
return append(tmpls,
template.NewExchangeTemplate(info),
template.NewEndpointsTemplate(info),
template.NewEndpointsServerTemplate(info),
)
}
return nil
}
func resolvePackagePath(outPath string) (string, error) {
lg.Logger.Logln(3, "Try to resolve path for", outPath, "package...")
gopath := os.Getenv("GOPATH")
if gopath == "" {
return "", fmt.Errorf("GOPATH is empty")
}
lg.Logger.Logln(4, "GOPATH:", gopath)
absOutPath, err := filepath.Abs(outPath)
if err != nil {
return "", err
}
lg.Logger.Logln(4, "Resolving path:", absOutPath)
for _, path := range strings.Split(gopath, ":") {
gopathSrc := filepath.Join(path, "src")
if strings.HasPrefix(absOutPath, gopathSrc) {
return absOutPath[len(gopathSrc)+1:], nil
}
}
return "", fmt.Errorf("path(%s) not in GOPATH(%s)", absOutPath, gopath)
}